Docs: Tools - Fix the formatting issue (modelcontextprotocol#1696)

* Fix the formatting issue

* Revert changes in older versions

---------

Co-authored-by: Alex.Akimov <[email protected]>
Co-authored-by: David Soria Parra <[email protected]>

Author: 3 people

docs/specification/draft/server/tools.mdx

@@ -203,7 +203,7 @@ A tool definition includes:
 - `outputSchema`: Optional JSON Schema defining expected output structure
   - Follows the [JSON Schema usage guidelines](/specification/draft/basic#json-schema-usage)
   - Defaults to 2020-12 if no `$schema` field is present
-- `annotations`: optional properties describing tool behavior
+- `annotations`: Optional properties describing tool behavior
 
 <Warning>
   For trust & safety and security, clients **MUST** consider tool annotations to